Histochemical Observations on Galactogen

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Abstract
A histochemical study has been made of the polysaccharide galactogen in the so-called albumin gland of Helix pomatia. Methods of distinguishing between this substance and glycogen are presented and the significance of the findings is discussed. Galactogen was attacked by “pectinase” but not by malt or salivary diastase. It stained with eosin and ruthenium red, and was metachromatic with aqueous toluidine blue. Glycogen on the other hand gave a negative result with these stains.